Line data    Source code

       1             : /*
       2             :    This file is part of TALER
       3             :    Copyright (C) 2022 Taler Systems SA
       4             : 
       5             :    TALER is free software; you can redistribute it and/or modify it under the
       6             :    terms of the GNU General Public License as published by the Free Software
       7             :    Foundation; either version 3, or (at your option) any later version.
       8             : 
       9             :    TALER is distributed in the hope that it will be useful, but WITHOUT ANY
      10             :    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
      11             :    A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
      12             : 
      13             :    You should have received a copy of the GNU General Public License along with
      14             :    TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
      15             :  */
      16             : /**
      17             :  * @file exchangedb/pg_do_reserve_purse.c
      18             :  * @brief Implementation of the do_reserve_purse function for Postgres
      19             :  * @author Christian Grothoff
      20             :  */
      21             : #include "taler/platform.h"
      22             : #include "taler/taler_error_codes.h"
      23             : #include "taler/taler_dbevents.h"
      24             : #include "taler/taler_pq_lib.h"
      25             : #include "pg_do_reserve_purse.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : 
      29             : /**
      30             :  * Function called insert request to merge a purse into a reserve by the
      31             :  * respective purse merge key. The purse must not have been merged into a
      32             :  * different reserve.
      33             :  *
      34             :  * @param cls the @e cls of this struct with the plugin-specific state
      35             :  * @param purse_pub purse to merge
      36             :  * @param merge_sig signature affirming the merge
      37             :  * @param merge_timestamp time of the merge
      38             :  * @param reserve_sig signature of the reserve affirming the merge
      39             :  * @param purse_fee amount to charge the reserve for the purse creation, NULL to use the quota
      40             :  * @param reserve_pub public key of the reserve to credit
      41             :  * @param[out] in_conflict set to true if @a purse_pub was merged into a different reserve already
      42             :  * @param[out] no_reserve set to true if @a reserve_pub is not a known reserve
      43             :  * @param[out] insufficient_funds set to true if @a reserve_pub has insufficient capacity to create another purse
      44             :  * @return transaction status code
      45             :  */
      46             : enum GNUNET_DB_QueryStatus
      47          13 : TEH_PG_do_reserve_purse (
      48             :   void *cls,
      49             :   const struct TALER_PurseContractPublicKeyP *purse_pub,
      50             :   const struct TALER_PurseMergeSignatureP *merge_sig,
      51             :   const struct GNUNET_TIME_Timestamp merge_timestamp,
      52             :   const struct TALER_ReserveSignatureP *reserve_sig,
      53             :   const struct TALER_Amount *purse_fee,
      54             :   const struct TALER_ReservePublicKeyP *reserve_pub,
      55             :   bool *in_conflict,
      56             :   bool *no_reserve,
      57             :   bool *insufficient_funds)
      58             : {
      59          13 :   struct PostgresClosure *pg = cls;
      60             :   struct TALER_Amount zero_fee;
      61             :   struct TALER_NormalizedPaytoHashP h_payto;
      62             :   struct GNUNET_TIME_Timestamp reserve_expiration
      63          13 :     = GNUNET_TIME_absolute_to_timestamp (
      64             :         GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
      65             :                                   pg->idle_reserve_expiration_time));
      66             :   struct GNUNET_TIME_Timestamp reserve_gc
      67          13 :     = GNUNET_TIME_absolute_to_timestamp (
      68             :         GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
      69             :                                   pg->legal_reserve_expiration_time));
      70             : 
      71          13 :   struct GNUNET_PQ_QueryParam params[] = {
      72          13 :     GNUNET_PQ_query_param_auto_from_type (purse_pub),
      73          13 :     GNUNET_PQ_query_param_auto_from_type (merge_sig),
      74          13 :     GNUNET_PQ_query_param_timestamp (&merge_timestamp),
      75          13 :     GNUNET_PQ_query_param_timestamp (&reserve_expiration),
      76          13 :     GNUNET_PQ_query_param_timestamp (&reserve_gc),
      77          13 :     GNUNET_PQ_query_param_auto_from_type (reserve_sig),
      78          13 :     GNUNET_PQ_query_param_bool (NULL == purse_fee),
      79          13 :     TALER_PQ_query_param_amount (pg->conn,
      80             :                                  NULL == purse_fee
      81             :                                         ? &zero_fee
      82             :                                         : purse_fee),
      83          13 :     GNUNET_PQ_query_param_auto_from_type (reserve_pub),
      84          13 :     GNUNET_PQ_query_param_auto_from_type (&h_payto),
      85             :     GNUNET_PQ_query_param_end
      86             :   };
      87          13 :   struct GNUNET_PQ_ResultSpec rs[] = {
      88          13 :     GNUNET_PQ_result_spec_bool ("insufficient_funds",
      89             :                                 insufficient_funds),
      90          13 :     GNUNET_PQ_result_spec_bool ("conflict",
      91             :                                 in_conflict),
      92          13 :     GNUNET_PQ_result_spec_bool ("no_reserve",
      93             :                                 no_reserve),
      94             :     GNUNET_PQ_result_spec_end
      95             :   };
      96             : 
      97             :   {
      98             :     struct TALER_NormalizedPayto payto_uri;
      99             : 
     100          13 :     payto_uri = TALER_reserve_make_payto (pg->exchange_url,
     101             :                                           reserve_pub);
     102          13 :     TALER_normalized_payto_hash (payto_uri,
     103             :                                  &h_payto);
     104          13 :     GNUNET_free (payto_uri.normalized_payto);
     105             :   }
     106          13 :   GNUNET_assert (GNUNET_OK ==
     107             :                  TALER_amount_set_zero (pg->currency,
     108             :                                         &zero_fee));
     109          13 :   PREPARE (pg,
     110             :            "call_reserve_purse",
     111             :            "SELECT"
     112             :            " out_no_funds AS insufficient_funds"
     113             :            ",out_no_reserve AS no_reserve"
     114             :            ",out_conflict AS conflict"
     115             :            " FROM exchange_do_reserve_purse"
     116             :            "  ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10);");
     117             : 
     118          13 :   return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     119             :                                                    "call_reserve_purse",
     120             :                                                    params,
     121             :                                                    rs);
     122             : }